What are the best tools for visualizing Terraform plans?

If you're just trying to grasp what will happen, I recommend looking at the summary from `terraform plan`. If you notice anything unexpected, you can dive into the full plan output. I haven’t really used visualizers myself, though.

If your plan grows too complex, it's usually a sign that you should break your Terraform files down into smaller, more manageable chunks. Keeping everything in a single state file can lead to confusion down the line.

The best way to visualize your Terraform plan is simply by using the `terraform plan` command. It shows you exactly what will be created, changed, or destroyed before you make any changes live. You can also save the plan using `terraform plan -out=plan.tfplan` and then run `terraform show plan.tfplan` for more details. If you're looking for an actual graphical representation, `terraform graph` can output a DOT format, which you can turn into a visual graph using Graphviz, though it can get messy with larger projects. Another option is Rover, which is an open-source tool that generates interactive graphs from your plan file, if you prefer more visual feedback.

I sometimes use a tool called tf-summarize. It's great for quickly checking object associations, especially when dealing with larger plans.

You can generate a DOT file with `terraform graph` and then use tools like Claude to convert that DOT file into a Mermaid diagram. It creates helpful visuals, but it's not always perfect—just something to consider.